Biology, B2.2.1 Exchange and transport 0.0 / 5 ? BiologyCells, tissues and organsGCSEOCR Created by: jodie.gCreated on: 30-05-18 17:26 What is surface area to volume ratio? The surface area per unit volume of an object. 1 of 8 When the SA:V is larger, the diffusion rate is... faster 2 of 8 The larger the organism, the ... the SA:V lower 3 of 8 What are alveoli? Alveoli are found in the lungs to maximise the rate of diffusion of oxygen into the bloodstream. 4 of 8 What are villi? villi are found in the walls of the small intestine to maximise the diffusion rate of digested food molecules into the blood. 5 of 8 Why are transport systems needed? Once a required substance is diffused into your body, it must be transported to where it is needed. 6 of 8 What is the main transport system in animals? The circulatory system 7 of 8 What is the plant transport system? Xylem and phloem tubes 8 of 8
Comments
No comments have yet been made